203032300021 has 8 divisors (see below), whose sum is σ = 206973065624. Its totient is φ = 199111288320.

The previous prime is 203032299947. The next prime is 203032300027. The reversal of 203032300021 is 120003230302.

It can be written as a sum of positive squares in 4 ways, for example, as 28262316996 + 174769983025 = 168114^2 + 418055^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 203032300021 - 2¹⁵ = 203032267253 is a prime.

It is a super-2 number, since 2×203032300021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203032299968 and 203032300004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203032300027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4917720 + ... + 4958833.

It is an arithmetic number, because the mean of its divisors is an integer number (25871633203).

Almost surely, 2^203032300021 is an apocalyptic number.

It is an amenable number.

203032300021 is a deficient number, since it is larger than the sum of its proper divisors (3940765603).

203032300021 is an equidigital number, since it uses as much as digits as its factorization.

203032300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9876951.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 203032300021 its reverse (120003230302), we get a palindrome (323035530323).

The spelling of 203032300021 in words is "two hundred three billion, thirty-two million, three hundred thousand, twenty-one".